1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Q.3932.4 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2016) SERIES Q: SWITCHING AND SIGNALLING Testing specifications Testing specifications for next generation networks IMS/NGN performance benchmark Part 4: Testing
2、of the performance design objectives Recommendation ITU-T Q.3932.4 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.9
3、9 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER
4、SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL
5、(BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR THE NGN Q.3000Q.3899 TESTING SPECIFICATIONS Q.3900Q.4099 Testing specifications for next generation networks Q.3900Q.3999 Testing specifications for SIP-IMS Q.4000Q.4039 Testing specifications for Cloud computi
6、ng Q.4040Q.4059 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.3932.4 (05/2016) i Recommendation ITU-T Q.3932.4 IMS/NGN performance benchmark Part 4: Testing of the performance design objectives Summary Recommendation ITU-T Q.3932.4 contains the benchmark testin
7、g of signalling parameters against the performance design objectives specified in Recommendation ITU-T Q.543 and ETSI TS 101 563, which are applicable to IMS/PES/NGN and VoLTE implementations. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Q.3932.4 2016-05-14 11 11.1002/100
8、0/12863 Keywords Benchmark, IP multimedia subsystem, IMS, new generation network, NGN, performance, PSTN/ISDN emulation subsystem, PES, signalling, testing, VoLTE. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendat
9、ions unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Q.3932.4 (05/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU T
10、elecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardizati
11、on Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technol
12、ogy which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance
13、 with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligat
14、ory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation o
15、f this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the
16、 date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to con
17、sult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.3932.4 (05/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Abb
18、reviations and acronyms 2 4 Metrics and design objectives . 2 4.1 Delay probability 2 4.2 Loads definitions 2 4.3 Parameter requirements (performance design objectives) . 4 4.4 Call processing performance objectives . 27 4.5 Transmission performance . 27 4.6 Slip rate . 27 Bibliography. 29 Rec. ITU-
19、T Q.3932.4 (05/2016) 1 Recommendation ITU-T Q.3932.4 IMS/NGN performance benchmark Part 4: Testing of the performance design objectives 1 Scope This Recommendation contains the benchmark testing of signalling parameters against the performance design objectives specified in ITU-T Q.543 and ETSI TS 1
20、01 563, which are applicable to IMS/PES/NGN and VoLTE implementations. The values of the performance design objectives (reference load A and reference load B), which are contained in this Recommendation and found in Table 1 to Table 9, are taken from ETSI TS 101 563. These values are “best practice“
21、 performance values measured on IMS/PES/NGN and VoLTE implementations. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were
22、 valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendat
23、ions is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.812 Recommendation ITU-T G.812 (2004), Timing requirements of slave clocks suitable for use as node clocks in synchronization netwo
24、rks. ITU-T G.823 Recommendation ITU-T G.823 (2000), The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy. ITU-T Q.541 Recommendation ITU-T Q.541 (1993), Digital exchange design objectives General. ITU-T Q.543 Recommendation ITU-T Q.543 (1993), Digital
25、 exchange performance design objectives. ITU-T Q.3403 v.1 Recommendation ITU-T Q.3403 v.1 (2016), IP multimedia call control protocol based on the session initiation protocol and the session description protocol Basic call: Requirements for the user side and the network side. ETSI TS 101 563 ETSI TS
26、 101 563 V1.4.1 (2015), Speech and multimedia Transmission Quality (STQ); IMS/PES/VoLTE exchange performance requirements. ETSI TS 102 250-2 ETSI TS 102 250-2 V2.4.1 (2015), Speech and multimedia Transmission Quality (STQ); QoS aspects for popular services in mobile networks; Part 2: Definition of Q
27、uality of Service parameters and their computation. ETSI TS 102 928 ETSI TS 102 928 V1.1.3 (2014), Speech and multimedia Transmission Quality (STQ); End-to-End Transmission Planning Requirements for Real Time Services in an NGN context. ETSI TS 183 036 ETSI TS 183 036 V3.5.1 (2012), Telecommunicatio
28、ns and Internet converged Services and Protocols for Advanced Networking (TISPAN); ISDN/SIP interworking; Protocol specification. ETSI TS 183 043 ETSI TS 183 043 V3.4.1 (2011), Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emul
29、ation; Stage 3 specification. 2 Rec. ITU-T Q.3932.4 (05/2016) 3 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AGCF Access Gateway Control Function CSCF Call Session Control Function ECM EPS Connection Management GW Gateway IAD Integrated Access Device
30、IMS IP Multimedia Subsystem ISDN Integrated Service Digital Network ITU-T ITU Telecommunication Standardization Sector MGW Media Gateway MME Mobility Management Entity MSAN Multi Service Access Node NGN New Generation Network P-CSCF Proxy Call Server Control Function PES PSTN/ISDN Emulation Subsyste
31、m QCI QoS Class Identifier RTP Real Time Protocol SBC Session Border Control SC Sending Complete SDP Session Description Protocol S-GW Signalling Gateway SIP Session Initiation Protocol TIE Time Interval Error UE User Equipment VGW Voice Gateway VoLTE Voice over LTE 4 Metrics and design objectives 4
32、.1 Delay probability This clause defines delay parameters related to ISDN/PSTN, IMS and VoLTE. The values are based on the values in ITU-T Q.543 and ETSI TS 101 563. 4.2 Loads definitions The ISDN/PSTN, IMS and VoLTE reference loads definitions and values described in Table 1 to Table 9 are the refe
33、rence loads definitions described in ITU-T Q.543 and ETSI TS 101 563. The derived ISDN procedures are based on the ISDN/SIP interworking ETSI TS 183 036 procedures, the derived PES procedures are based on the IMS/PES Emulation specification ETSI TS 183 043 Rec. ITU-T Q.3932.4 (05/2016) 3 and the der
34、ived SIP procedures are based on session initiation protocol (SIP) and session description protocol (SDP) ITU-T Q.3403 v.1. Figure 1 IMS/LTE basic configuration Figure 2 AGCF/VGW session processing models Figure 2 illustrates the session processing model used by the AGCF and VGW functional entities.
35、 An AGCF is modelled as comprising ITU-T H.248 Media Gateway Controller (MGC), Feature Manager (FM), and SIP UA functionality. An AGCF interfaces to a Media Gateway (MG) and also to the S-CSCF (via P1 and Mw reference points respectively). 4 Rec. ITU-T Q.3932.4 (05/2016) A functional modelling of th
36、e VGW contains an entity similar to ITU-T H.248 Media Gateway Controller, a Feature Manager, a SIP UA, and MGW functionality. The VGW interfaces to the P-CSCF using the Gm reference point. The SIP UA functionality provides the interface to the other components of the IMS-based architecture. It is in
37、volved in registration and session processing as well as in event subscription/notification procedures with application servers. The MGC functionality enable the session processing functionality to interface with existing line signalling such as analogue signalling or DSS1. Session and registration
38、processing in the AGCF or VGW involves two halves: ITU-T H.248 based MGC processing and SIP user agent (UA) processing (see Figure 2). MGC processing focuses on the interactions with the media gateway functions, while SIP UA processing focuses on the interactions with the IMS components. The feature
39、 manager (FM) coordinates the two processing activities. 4.3 Parameter requirements (performance design objectives) IMS/PES/VoLTE exchange implementations shall comply with the requirements given in Table 1 to Table 9. NOTE The values of the performance design objectives (reference load A and refere
40、nce load B), which are contained in this Recommendation and found in Table 1to Table 9, are taken from ETSI TS 101 563. 5 Rec. ITU-T Q.3932.4 (05/2016) Table 1 Meaning of timers Parameter ITU-T Q.543 IMS, PES equivalent Reference load A Reference load B Detailed description Mean value 95% probabilit
41、y of not exceeding Mean value 95% probability of not exceeding Local exchange call request delay originating outgoing and internal traffic connections ANALOGUE SUBSCRIBER LINES Local exchange call request delay originating outgoing and internal traffic connections. Clause 2.3.2.1of ITU-T Q.543 For A
42、NALOGUE SUBSCRIBER LINES, call request delay is defined as the interval from the instant when the off-hook condition is recognizable at the subscriber line interface of the exchange until the exchange begins to apply dial tone to the line. The call request delay interval is assumed to correspond to
43、the period at the beginning of a call attempt during which the exchange is unable to receive any call address information from the subscriber. PES ETSI TS 183 043 For ANALOGUE SUBSCRIBER LINES connected to the AGCF/MSAN. Call request delay is defined as the interval from the instant when the off-hoo
44、k condition is recognizable at the subscriber line interface of the AGCF/MSAN until the AGCF/MSAN begins to apply dial tone to the line. 400 ms 600 ms 800 ms 1 000 ms ANALOGUE SUBSCRIBER with IAD (VGW) Local exchange call request delay originating outgoing and internal traffic connections. PES ETSI
45、TS 183 043 For ANALOGUE SUBSCRIBER LINES connected to the VGW. Call request delay is defined as the interval from the instant when the off-hook condition is recognizable at the subscriber line interface of the VGW until the VGW begins to apply dial tone to the line. 400 ms 600 ms 800 ms 1 000 ms 6 R
46、ec. ITU-T Q.3932.4 (05/2016) Figure 3 Local exchange analogue subscriber call request delay: overlap sending 7 Rec. ITU-T Q.3932.4 (05/2016) Table 2 Meaning of timers Parameter ITU-T Q.543 IMS, PES equivalent Reference load A Reference load B Detailed description Mean value 95% probability of not ex
47、ceeding Mean value 95% probability of not exceeding Local exchange ISDN subscriber call request delay: overlap sending ISDN SUBSCRIBER LINES Local exchange call request delay Overlap sending. Clause 2.3.2.2 of ITU-T Q.543 Local exchange call request delay. Call request delay is defined as the interv
48、al from the instant at which the SET-UP message has been received from the subscriber signalling system until the SET-UP ACKNOWLEDGE message is passed back to the subscriber signalling system. ISDN ETSI TS 183 036 Call request delay is defined as the interval from the instant at which the SET-UP mes
49、sage has been received from the subscriber signalling system until the SET-UP ACKNOWLEDGE message is passed back to the subscriber signalling system. 200 ms 250 ms 300 ms 400 ms IMS SUBSCRIBER Local exchange call request delay. IMS ITU-T Q.3403 v.1 Call request delay is defined as the interval from the instant at which the INVITE message has been received from the SIP subscriber until the 100 Trying from the SBC/P-CSCF is passed back to the subscriber. 15 ms
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